rosback



No. 623,258.v v Y Patented Apr. I8, i899.

F. P. RUSBACK.

MACHINE FOB STEP HITERING BOX BLNKS.- (Application med ip 22, lss.)

(No Model.)

I4 Sheets-Sheet I.

No. 623,258. 'Patented Apr. 18,1899. F. P. nosAcK.

MACHINE FUR STEP MITERING BOX BLANKSv (Application led Dec. 22, 1898.)(No Model.) I4 Sheets-Sheet 2.

(No Modal.)I

Patented Apr. I8, |899.` F. P. RUSBACK.

MACHINE FUR STEP MITERING BOX-BLANKS.

(Applicaticn led Dec, 22, 1898.)

f E smi w @Wgzg No. 623,258i Patented- Apr. I8, |899.

F. P. BUSBAUK.

MACHINE FUR STEP MITERING BOX BLANKS.

(Application lad Dec. 22, 1898.)

I4 Sheets-Sheet 4.

(No Model.)

|N| n .wm l \N, QN h h NM1 m NM. 5E i \J I 1 Ww mmwnmx .IN mul w RCS QHLw N E S Mml N m 1 R S i E [Il l Nv `NN\ m la I. www El mi N mi. @my M.Q m mk m I i M N w) E@ .WWI n D u NN. 1 M. .\m.\ E wma N( .mwr w ggg@ HMma cams PETERS ca woran' No. 623,258. Patented Apr. I8, |899.

F. P. RDSBACK.

MACHINE FUR 'STEP MITEHING BOX BLAMKS.

(Application med Denim, 189s.) (No Model.) I4 Sheets-Sheet 5.

Elf

IIHIIM ||||||||||||||||l|l l @www I; Il

.wmulumum-mnl "W "w ilfiimnnm llllllllllflillllllll Patented Apr. I8,|899.

F. P. BUSBACK. MACHINE FOR STEP MITERING BOX BLANKYS.

(Application tiled Dec. 22,1898.)

I4' Sheets-Smet 6.

(No Model.)

T uns s PETERS ou, worauf No. 623,258. Patented Apr. I8, I899.

F. P. RDSBACK.

MACHINE FUR STEP MITEBING BOX BLANKS.

(Application filed Dec. 22, 189B.)

I4 Sheets-Sheet 7.

(No Model.)

.Z2 or.;

Mmc., wAswNmUN, D. c.

No. 623,258. Patented Apr. |a, |899'.

F. P. nosBAcK.

MACHINE FDR STEP MITERING BOX BLANKS.

(Application filed Dec. 22, 1898.)

(No Model.)

Ilm IL Tm: owns PETERS co. PHaroLlTno.. wuNINGYON. n. cA

No. 623,258. Patented Apr. I8, |899.

F.P. RUSBACK.-

MACHINE FDR STEP MITERING BOX BLANKS.

(Application led Dec. 22, 1898.) (No Model.) I4 Sheets-Sheet 9.

Tn: Ncnms vErEns no.. PuumLrmm wAsulNGroN, D. c

'Patented' Apr. 18, |899.

F. P. BDSBACK. MACHINE FR STEP MITERING BOX BLANKS.

(Application led Dec. 22, 1898.)

I4 Sheets-Sheet ID.

(En Model.)

TME Nonms Firms no., PHo1aL|Tuo..wAsHmGToN, u. c.

Patented Apr. la, |899. F. P. nosBAcK.

MACHINE FUR STEP MITEBNG BOX BLANKS.

(Appnwcion med nec. 22, 189s.)

I4 Sheets-Sheet Il.

(No Model.)

IIIIIIIIIIIIIIIP w mw n 1@ *li w rsvelr F. P. nosBAcK.

Patented Apr. I8, |899.

MACHINE FOB STEP MITERING BOX BLANKS.

(Application led Dec. 22, 1898.)

lllllllllllllillIlllllllllllIIIIIIIIIIIIIIIIIIII IIIIIllllIl||||l|IlIlIIIIIIIIII||IlIIllllllllllllllllllllllll all @@VMZH No.623,258. Patented Aprf'l', |899.

F. P. nos'BAcK. MACHINE FUR STEP MITERNG BOX BLANKS.

(Application led Dec. 22, 1898.) (No Model.) I4 Sheets-Sheet I3.

:- A u; v Y

"0135-234258- Patented Apr. la, |899.

' F. P. nosAcK.

MACHINE FOR STEP MITEBING BOX BLNKS.

(Application med Deo. 22, 1898.) (No Modal.) Y I4 Sheets-Sheet I4.

@a/2M@ 9 M25 cuius versus co.. Paura-ums.. WASHINGTON D c.

UNTTnn STATES 71'; @ZZ whom it may concern,.-

Beit known that LFREDERICK P. RosBAcK,

a citizen of the United States, residing at Chicago, in the count-y ofCook and State of Illinois, have invented a new and useful Improvementin Machines for Step-Mitering Box-Blanks, of which the following is aspecification.

The invention relates to an improved inaro chine for step-miteringbox-blanks at suitable intervals to adapt them to be bent to formthecorners of angular boxes with the opposite sections of each set ofstep-mitered cuts internieshing. TheboX-blank, for stepmitering whichmore particularly the present machine is devised, comprises a thin sheetof wood reinforced on opposite sides, respectively, with parallellongitudinally-extending cleats and wires, the cleats, sheet, and wiresbeing fastened together at intervals, as with staples driven through thesheet into the cleats and over the wires to straddle them. A top planView of the blank is shown in Fig. 1 and an edge View in Fig. Set of thedrawings. The action of this machine is that of producing thestep-mitered cuts in the cleats and under surface of the sheet. of ablank fed to it and also to trim the blank to the proper length.

The present machine is an improvement on that forming the subject of myformer patent, No. 609,630, dated August 23, 1898.

Referring to the accompanying drawings, Figure 1 is a View in elevationof the machine regarded from one side; Fig. 2, a similar view of themachine regarded from the opposite side; Fig. 25, a longitudinal sectiontaken at the line 8 on Fig. (3 and viewed in the direction of the arrow;Fig. 4, a section taken at the line 4 on Fig. 3 or atthe line It on Fig.6 and viewed in the direction of the arrows; Fig. a section taken at theline 5 on Fig. 3 and viewed in the direction of the arrow; Fig. 0, asection taken at the line 6 on Fig. 1 and viewed in the direction of thearrow; Fig. 7, a section taken -at thev line 7 on Fig. G and viewed inthe direction of the arrow; Fig. 8,a section taken at thelne 8 on Fig. 5and viewed in the direction of the arrow; Fig. 9, a section taken at theline 9 on Fig. 6 and viewed in the direction of the arrow; Fig. 10,

FREDERICK P. ROSBACK, OF CHICAGO, ILLINOIS, ASSIGNOR TO IVILLIAM P.HEALY, OF SAME PLACE.

MACHINE FOR STEP-lVllTE-RING BOX-BLANKS.-

SPECIFICATION forming part of Letters Patent No. 623,258, dated April18, 1899.

Application filed ecemhr 22, 1898. Serial No. 700,019. (No model.)

aview in elevation of the parts illustrated in Fig. 9, but regarded fromthe opposite side; Fig. 1l, a viewinside elevation ot1 one of theseveral opposite end bifurcated bed-.rails of the machine with themechanism carried by it, but omitting the cross-girders and diskclusters and their shafts; Fig. 12, a section of the saine, taken at theline l2 on Fig. 13 or at the line 12 on Fig. 14 and viewed as indicatedby the arrows', but omitting the half-nuts for adjusting the bed-rail;Fig. 13, a section taken at the line 13 on Fig. 12 and viewed in thedirection of the arrow; Fig. 14,apartlybroken top plan view of themechanism illustrated in Fig. l1; Fig. 15, a broken view showing one ofthe cutting-saw clusters in position on their vertically-adjustablesupporting-shaft; Fig. 16, a broken view, in side elevation, vof one ofthe cutting-saw clusters; Fig. 17, a View like that presented by Fig. 15of one of the chipping-disk ciusters on their vertically-adjustableshaft; Fig. 18, a broken View, in side elevation, of a chipping-diskcluster; Fig. 19, a section taken at the line 19 on Fig. 12, viewed inthe direction of'the arrow and enlarged; Fig. 20, a section taken at theline 20 on Fig. 12, Viewed in the direction of the arrow and enlarged;Fig. 21, a broken section taken at the line 21 on Fig. 11, Viewed in thedirection of the arrow and enlarged; Fig. 22, a section taken at theline 22 on Fig. 11 and enlarged or at the line 22 on Fig. 21 and viewedin the direction of the arrows; Fig. 23, a section taken at the line 23on Fig. 22 and viewed in the direction of the arrow; Fig. 24, a sectiontaken at the line 2i on Fig. 12, viewed in the direction of the arrowand enlarged; Fig. 25, a broken section taken at the line 25 on Fig. 1,viewed in the direction of the`arrow and enlarged; Fig. 26, a brokenView showing the carrier-feed clutch device in elevation; Fig. 27, abroken section taken at the line 27 on Fig. 1, viewed in thedirection ofthe arrow and enlarged; Fig. 28, a view like that presented by Fig. 26of the carrier-return clutch device; Fig. 29, a section taken at theline 29 on Fig. 1, viewed in the direction of the arrow and enlarged;Fig. 30, a broken-view in end elevation of the mechanism at theright-hand side of the front of the machine, showing the relativeposition of IOO the feed-guide to the step-mitering machine; Fig. 3l,aview in the nature ofadiagram of the automatic carrier feed and returngoverning mechanism; Fig. 32, an enlarged sectional elevation showing adetail of construction relating to the adjustment of a bed-rail; Fig.33, a broken View, in sectional elevation, of the machine, showing twoblanks respectively in position after delivery past and previous todelivery to the saws; Fig. 34,`a'n edge vie`w`of a box-blank` before itssubjection to step-mitering; Fig. 35, a similarview of the same after ithas been step-mitered; Fig. 36, au enlarged broken view showing acluster of the cutting-saws and the relative position of a box-blank asit is fed thereto; Fig. 37, a broken view showing a cluster ofchippingdisks and the relative position of a blank being fed thereto;and Fig. 3S, an enlarged broken view of one corner portion of a box,showing how a step-mitered-blank is bent to form the corner.

The frame of the machine comprises the two parallel sides A and A',provided with legs A2 toward their opposite ends and with correspondingcentral uprightI cheeks A3 and A4 rigidly connected togetheracross themachine by a bar A5, bolted to their upper ends, and the sides arefurther reinforced by the crossgirders AG and A7, extending between themrespectively toward their opposite ends and provided in their uppersides with longitudinal slots t of inverted-T shape in crosssection andenlarged for the purpose of bolthead insertion at their opposite ends.

In the inner sides of the cheeks AS A4 are formed, to extend from theirupper ends to rectangular openings r in the centers of the respectiveframe sides, central vertical guidegrooves q q, and back of theseopenings in the sides A A are similar openings fr'.

B is a cross-head in the form of a plate having a flange p extendingforward along its upper edge, a ledge p' extending backward from itslower edge, and a slot t of T shape in cross-section formed in its frontside and enlarged at its opposite ends, and at the opposite ends of theplate B are legs B B', provided along their outer sides with verticalribs p2, extending to the top of the plate and coniined in the groovesq, Fig. 5. These legs terminate at their lower ends in shoes B:a B2,each provided on its outer side, respectively, near the heel portion andthe toe portion with rectangular lugs 113 p4, forming journal-bearingsfor the rotary saw-shafts, as hereinafter described, and surrounded bybosses p5. These lugs extend into the openings rand r' in the framesides, andthe crosshead B is supported at theln in averticallyadjustable manner, hereinafter described. At intervals alongthe cross-head B are adjustably supported presser-feet B3, carryingantifriction-rollers t" in their bifurcated lower ends, the feet havingupright Shanks r, containing vertical slots. t2, through which passbolts fr?, confined in the cross-head slot z5 and carrying nuts o3,whereby on loosening a nut a presser-foot may be slid on itssupportingbolt in the slot to vary its position. Each presser-foot isset against vertical upward displacement by a set-screw device fc4,con-l fined at its opposite ends between the ange 1J and upper end ofthe shank r, and to render rigid and prevent tilting of the presserfootfrom the level position its base should always occupy a head t5 bearsagainst it toward its rear end, the head being confined bya set-screwo6, depending through the ledge p.

C C are the longitudinal bed-rails, provided in desired number. themachine, as illustrated.) A presser-foot is provided for each bed-rail,the construction of which is most clearly shown in Fig. 13. Each railhas extending throughout its ent-ire length aT-socket s in its upperside, Fig. 22, and involves an intermediate web portion having theenlargements s and s2, affording perpendicular journal-bearings, and thetransverse openings s3 s4, adjacent to which, respectively, are theopenings S5 s, having half-round concave outer ends, and the endportions of each rail are bifurcated and provided at theirbackwardly-inclined extremities with journal-bearin gs for the shafts ofthe sprocket-wheels of the chain-feed hereinafter described. In eachrail C are also provided the vertical recesses 37 38, extending from thetop of the rail and respectively coinciding with the enlargements s 32.These bed-rails are supported ou the cross-girders A6 A7, which passthrough them at the openings s3 34, and are each adjustably fastened toits supporting-girder, as most clearly shown in Fig. 32, by bolts w',confined in the girderslots t and passing through lateral flanges tuatopposite sides of each rail, where it intersects with a girder, thebolts being fastened by nuts 102. Then the nuts fil/2 of a bed-rail areloosened, it may by sliding it be moved bodily with relation to anadjacent bed-rail, and screw-and-nut mechanism for so moving it isprovided, as hereinafter described.

D? is the rotary shaft for the clusters of cutting-saws D, and D3 is asimilar shaft for the clusters of chipping-disks D. D2 is driven from abelt-pulley D'1 on one end, and the shaft D3 is driven from abelt-pulley D5 on the opposite end. These shafts extend transverselyacross the machine, being respectively journaled at their ends inthebearings aiforded by the lugs 293194 on the shoe ends of the cross-hcadlegs Bl and being also journaled between their ends at the recesses S7ss, provided in the bed-rails C, thus crossed by the saw-shafts. YIn thebase of each bearing p3 and p there is confined at its squared headagainst rotation'(as shown of the bearing p3 in Fig.'29) a nut o,engaged by the threaded end of a stem o', rotatably con lined at itsshoulder o2 in a socket o3, into which the nut enters, the socket beingformed in the frame side. Underneath the socket is a collar 04, fastenedto the stein and carrying a (Five are employed in IOO IIO

The shaft l sprocket o5. The sprockets on the two stems o' under thebearings p3 and p4 at each side of' the machine are geared together byan endless chain o6, and the stem o' under each bearing p3 carries onits lower end a ruiter 0T, meshing with a similar miter oS on a rotaryshaft Q9, equipped with a hand-wheel 010 on one end and journaled towardits opposite ends in bracket-arms ou, supported from the bases of theframe sides A A. The en d of thc shaft o9 which projects beyond theframe side A carries a collar 0l2 to confine the shaft againstlongitudinal movement, Fig. G.

The shaft o9 contains a longitudinal groove .au for keys, and it issupported at intervals between its end bearings in brackets 013,fastened to depend from the sides of the bedrails C. A miter oSS abutsagainst the bearing portion of each bracket o13 and is keyed on theshaft o9. In each of sockets s' 82, forming enlargements in the webportion of each bed-rail C, is slidingly confined a nut 0", Figs. 15,17, and 20, terminating at its upper end in a ring n, these rings beinglocated within the planes of t-lie'recesses sT ,S8 iu the bed-rails.rlhe threaded end of avertical stem o33 enters each nut 099 and isrotatably confined in the socket of that nut by a.

shoulder 022, and the lower projecting end of each stem o33 has fastenedto itA a collar 044, carrying a sprocket On the lower end of thethreaded stein in each socket s there is provided on the collar 04l amiter 07T, meshing with an adjacent miter oS8 on the shaft 09, and thesprockets o55 on the stems 033 of each pair of the sockets .5" s2 aregeared together by a chain 066.

The cutting-saw shaft D2, in addition to being journaled at 233193,passes through and finds bearing (though indirect, as will hereinafterappear) in one series of the rings n, extending across the machine inthe recesses S7, and the chipping-disk shaft D3, in addition to bein g jou rnaled at p4 p4, passes through and finds bearing in the same wayinthe other series of rings n in the recesses S8.

From the foregoing it will be apparent that by turning the shaft 0J atthe hand-wheel o10 the following adjustments ensue: Depending on thedirection of turning the shaft the four screw-'stems 0' will be turnedcorrespondingly to raise or lower the nuts o, and accordingly move thecross-head B up or down, and with it the presser-feet B3 it carries andthe cluster-shafts D2 D3, journaled in the bearings p3 1)", resting onthe nuts o, and the gearing, with the shaft of of the screw-stems 033,carrying the two intermediate series of bearing-rings la, supporting thetwo cluster-shafts, causes turning of the shaft o'J to move these ringscorrespondingly with the bea1ingsp3p1,ivheie by all the bearings for thetwo cluster-shafts are correspondingly adjusted by turning the shaft of)to adjust the cluster-shafts equally throughout. Obviously thisadjustment does not affect the relations between the presserfeet anddisk clusters, but only the distance between the bases of thepresser-feet and bed I of the machine afforded by the tops of thebed-rails C to raise the presser-feet for the accommodation below themon the bed of thicker blanks and lower them to contact with thinnerblanks, the disk clusters being raised or lowered accordingly to cut andchip, respectively, higher or lower, as the case may be, for the thickeror thinner material to be step-mitered.

At intervals on the shaft D2 are the clusters D of circular,cutting-saws of the form most clearly shown in Figs. 15 and 16. Each ofthe clusters D between the end clusters (which are distinguished as D11)consists, preferably, of eight saw-disks, the two outer ones m being ofthe same diameter, the two next inner ones m being of slightly-greaterdiameter, the two next ones m2 being of still greater diameter, and thetwo central ones m3m4 being one of slightly-greater diameter than theother and each of greater diameter than the saws m2. The saw clustersD11 at the opposite ends of the shaft are shown to be composed of fiveof the disks m., m', m2, m3, and m4, with the disk of greatest diameteroutermost in each case and of materially greater diameter than that ofthe largest disk of a cluster D for cutting through and trimming theopposite ends of the blank. The saw clusters D D11 produce the initialsaw-cuts for step-mitering a blank E and engage the blank, as indicatedy Zat the other side of the rigid shoulder Zlv from that carrying thesaw-disks enters a ring n, confined between the rigid shoulder and awasher Z5, secured by a nut ZG.

On the shaft D3, at intervals to coincide with the clusters D DH, arethe clusters D of chipping-disks, each consisting of seven toothed disksof the relative diameters illustrated in Figs. 17 and 18 to attack theblank, as indicated in Fig. 37, and chip out the wood between the cutsmade by clusters D D11 and produce step-miters E', as shown in Fig. 35.The chipping-disk clusters at the ends are distinguished as D22, as theyeach involve only four disks. Each cluster D D2? is fastened to theshaft D3 to rotate with it, but permit of being slid for adjustmentlengthwise thereof by means (shown in Fig. 17) like those employed forfastening the saw clustersnamely, a sleeve Z, keyed to the shaft and inwhich the clust-er is keyed -and confined between a flange Z and awasher Z2, securedV by a nut Z3, the sleeve extending through the ringu, through which the shaft D3 passes and be- IOO IIO

IZO

ing confined between the sleeve-Hange Z/ and a washer Z5, secured by anut Z6.

Another adjustment is provided in the inachine for the cutting andchipping clusters to bring them or certain of them closer together orseparate them farther apart on their respective shafts, according to therelative positions` in a blank in which the step-miters are to beproduced for a square box or one longer in one direction or on one sidethan the other. The mechanism shown for effecting this adjustin entinvolves the following construction:

F F' are rotary shafts threaded throughout and journaled at theiropposite ends, respectively adjacent to the i nner sides of the girdersA6 A7 in the frame sides. These shafts are stopped against longitudinalmovement, as clearly shown in Fig. 5, and carry at their ends projectingbeyond the frame side A miters u and u', respectively meshing withmiters u2 and n3 on the opposite endsof a rotary shaft n4, journaled inbearings U5 a5, extending from the outer side of the frame side A. Thescrewshaf t F carries on one end a handwheel a6. ln the openings S5 s ofeach bedrail C, Fig. ll, are provided, respectively, the slidinghalf-nuts s55 ands, each containing ahalf-round threaded recess s in itsend ad-V jacent to the screw-shaft. Each of these nuts, the constructionof which is shown clearest in Figs. 2l to 23, is iianged on one side tooverlap the opening containing it at one side of the rail C and providedwith a cap 5', fastened to its opposite side, there to overlap and thusconfine the half-nut slidingly in place. Between each pair of the nutss55 S66 on one side of the web of each bed-rail C is fulcrum ed, betweenits ends, a lever 7o, connected from one end by a link 7a2 with the nutS66 and from its opposite end by one arm of a bell-crank 7a' with thenut S55, the other arm of the bellcrank having connected with it one endof a rod or handle 7c3, the free end of which is bent to a right angle,there to enter either of two holes 704 or'7t5, formed one in advance ofthe other in the side of the respective bed-rail near the front end ofthe machine, Fig. 3.

Then the nuts s55 S66 are out of engagement with the screw-shafts,turning them by turning the hand-wheel 'n.6 will not cause them toproduce any action. Vhen, however, it is desired to adjust any pair ofclusters D D' with relation to another pair thereof on their shafts, therespective rod 7c3 is drawn, after freeing its outer end from theopening 7a4, to bring it coincident with the opening 105, into which itis inserted to retain it. Thereby the lever 7c is turned to move thenuts s55 S66, through its connections with them, into mesh with theshafts F F', when turning them in one or the other direction at thehand-wheel a5 moves the respective rail C (the nuts cu2 of which havebeen preparotarily loosened to be tightened again after the adjustment)accordingly along the girders ASA?. The connection of thecluster-carrying sleeves Z with the rings n and their rigid connectionwith the rail cause the described movement of the latter to movecorrespondingly with it the sleeves and the clusters thereon. Thusadjustment of the clusters D D may be accomplished to a small fractionof an inch.

The mechanism for feeding across the clusters a blank to be step-miteredcarries it slowly through the machine and then makes a quick return foranother Vblank to b e acted on. This mechanism, as shown, involves thefollowing-described construction: Journaled at in the oppositebifurcated ends of each bedrail C and the ends of the frame sides A A'are lon gitudinally-grooved rotary shafts G2 G3, extending entirelyacross the machine and carrying at corresponding ends, respectively, thecog-wheels Hand H'. In the opposite bifurcated ends of each bed-rail arekeyed on the shafts G2 G3, to rotate with them, but to permit of theirsliding thereon with the adjusting movement described of the bed-rail,sprocket-wheels G, connected by an endless chain G. A portion of eachchain passes through the base portion of the longitudinal socket s of abed-rail C and has fastened to it a rigid bar G4, the shape of which incrosssection is shown in Figs. (3 and24. This bar is provided in itsupper expanded side with a central T-slot t3, in which are confined bynuts w3 screw-bolts whaving their heads countersunk in blocks G5, whichthe bolts thus adjustably secure to the bar G4. The chains G' on theirsprocket-wheels, with the bars G4 and blocks G5, thus form a carrier forthe blanks to be step-mitered, having its path on the bed-rails C andextending across the shafts D2 D3 and clusters thereon.

On stub-shafts I l respectively journaled on the opposite ends of theframe side A are fastened pinions l2 13, meshing with the gearwheels H Hand belt-pulleys I4 I5, the latter having a straight-belt connection 155(represented in Fig. l) with one drive-shaft I7 for the feed or advanceof the carrier, and the former having a cross-belt connection 144 withanother drive-shaft I6 for the return of the carrier. The wheel H, byits gear connection with the drive-shaft I, is continually driven in onedirection, but idly on its shaft G2 until clutched thereto, ashereinafter described, and t-he wheel H', by its gear connection withIOO IIO

the shaft l7,is continuously driven in the saine v manner in theopposite direction. On the shaft G2 is a clutch t' and on the shaft G3is a clutch i', each clutch comprising a stationary member on the hub ofa gear-wheel and a sliding member on the respective shaft carrying thegear-wheel, the clutch i being at the outer side of the frame side A andthe clutch i' at the inner side thereof.

K is a rock-shaft journaled in suitable bearings near the hase of themachine to extend lengthwise thereof and carrying at one end an arm i2,engaging with the movable member of the clutch t, and K is anotherrockshaft similarly j ournaled and carrying on one end an arm is,engaging with the movable member of the clutch i. On the two shafts Kand K' are provided, coincidentwith each other, the upward-projectingarms i4 5, Fig. 6, pivotally connected at their upper ends by a trip-barL, extending across the base of the machine beyond the side A thereof tothe automatic clutch-actuating mechanism M, (illustrated in Fig. 31,)and which may be located in any convenient position relative tothestep-miteringmachine. Thismechanism, as illustrated, comprises aconstantly-rotating shaft h, carrying a crank-arm 77,', provided with athimble at its free end, a lever h2, fulcrumed at 7:,22 at one end,pivotally connected between its ends with the trip-lever L, and carryingat its free end a thimble extending adjacent to that on the free end ofthe crank 7L', and a bell-crank M', fulcrumed at its angle at hm, withone arm h3, pivotally connected between its ends to the adjacent end ofthe trip-bar, and its free thimble-equipped end extending in horizontalalinement with the free end of the lever h2 across the path of the freeend of the crank 7L', and with the free thimbleequipped end of its otherarm h4 extending over the shaft h in the plane between the lever 7b2 andbell-crank arm h3, adjacent to the path of the free end of the crank h.The arrangement is such, as will be observed, that the clutches t' andt" are engaged in contrary directions, and also, of course, similarlydisengaged. With the parts of the mechanism M in the relative positionsrepresented in Fig. 3l both clutches are disengaged, and the mechanismof the step-mitering machine is illustrated in the condition with thisposition of the parts of the clutchwactuating mechanism. Therefore inthe rotation of the shaft 7L in the direction indicated by the arrow inFig. 31 the crank h engages the lever h2, then extending into its path,turning it out of the path and at the same time drawing the arm h3farther into the path and accordingly turning the arm h4 out of thepath. This action lshifts the bar L to rock the shafts K and K in thesame direction, thereby engaging the feed-clutch t and throwing theloose member of the retu rn-clutch t' still farther out of engagementwith its companion member, thus twice the distance therefrom that thefree member of the clutch t" was initially from its companion member.This clutch engagement produces rotation of the shaft I to drive theshaft G3, and thus turn all the sprockets G G in the direction toactuate the chains G to advance a blank E, imposed on the blocks G5, ashereinafter described, across and beyond the clusters D D. By that timethe shaft 7L in its continued rotation through a half-revolution willencounter the arm h3, extending into its path twice as far as the leverh2 extended therein, and will throw it out, accordingly, twice theextent of the throw of that lever, thereby turning the bell-crank arm7L" into the path of the crank h to the same extent as the lever h2 isshown in the path, but shifting the trip-bar L twice as far as be- .atits free end with and carries a bar g4.

fore and in the contrary direction,'thereby moving the loose member ofthe return-clutch t' into engagement with its companion member and-thato f the feed-clutch t" to the extreme end of disengagement with itscompanion member. This engaging of the clutch t' causes the rotation ofthe shaft I, more rapidly rotating than the shaft T, to be imparted tothe shaft G2 to reverse the' travel of the chains G and quickly returnthe blank-carrier to its initial position to receive another blank to bestep-mitered. A quarter-revolution of the shaft 7L will bringthe carrierto that position when the crank h encounters the bell-crank arm h4,throwing it out to the' position in which it is illustrated in Fig. 31,thereby returning the arm h3 and lever h2 to their illustrated initialpositions and as the result shifting the trip-bar L far enough to turnthe shafts K K sufficiently to disengage the loose members of bothclutches t' t" from their companion members, bringing them to theirintermediate positions, and thus stopping the travel of the carrieruntil at the end of the last quarter-revoluiion of the shaft 7L thecrank 7i' encounters the lever h2 to repeat the operation described.

Connected with the-trip-bar L to be actuated by its movements ismechanism for receiving a blankE to be fed to the machine on a planeabove that of the carrier, then dropping it upon-the carrier to bring itinto position to be step-mitered by the mechanism therefor, and afterthe step-mitering operation lifting the finished blank above the planeof the blocks G5 to permit the carrier to be returned, as heretoforedescribed, to its initial position for receiving a fresh blank.

As shown, the mechanism referred to involves the following construction:Between the legs A2 on opposite sides of the longitudinal center of themachine and on the base upon which the machine is supported are journaled in suitable standard-bearingsg the rock-shafts N and N. On theseshafts, Figs. 6 and 7, at the inner sides of a pair of the standards gnearest the front end of the machine are fastened collars (/carrying up-IOO IIO

IISv

wardly-projecting arms g2, bifurcated at their the opposite ends of eachrock-shaft NN are fastened arms g3, (shown in angular form,) each pairof which toward the front and rear ends of thel machine is pivotallyconnected At corresponding intervals along the bars gLl there bear,withantifriction-rollersf2 on their lower ends, vertical rods f, passingupward th rough guide-bearingsf3f4, provided in suitable position onsides of bed-rails C, and coinciding rods f near opposite ends of thebed-rails are rigidly connected by bars f, eX- tending alongside of suchbed-rails.

W'hen the clutch-actuating mechanism M throws the trip-bar L in thedirection, as described, for engaging the feed-clutch i', the

connection of the trip-bar with the rockshafts N N turns themaccordingly, and with them the arms g3, to lower the bars g4 below theplanes at which they are shown in Fig. 6, thereby permitting the rods f'to drop by gravity, and carry with them the bars f, considerably belowthe tops of the carrier-blocks G5. rlhe return throw of the vtrip-bar Lfor engaging the clutch t' rocks the shafts N N in the oppositedirection to turn the arms g2 accordingly and raise the bars g4, therebyraising the bars f high above the carrierblocks, and the throw of thebar L, which produces, as described, the disengagement of both clutchest' lL", brings the bars g4 to the positions in which they are shown inFig. 6, wherein the barsf project slightly above the planes of thecarrier-bars.

The operation is as follows: At the righthand corner of the front of themachine is shown, Fig. 30, a guide-support- T, leading transversely ofthe carrier in its initial position. From this guide-support the blanksEare fed to the machine automatically or by hand at proper intervalsendwise, with their cleats d undermost and wires c uppermost. In slidinga blank from the support T upon the machine the free advance ends of thewires e pass under and encounter a bar e', extending across the supportin their path, and are thus bent back tothe condition shown out of thepath of the saw clusters D11 at the farther side of the machine, and theopposite or rear free ends of the wires e as the blank is being fed tothe saws, as hereinafter described, encounter a rigid deflector O,provided in their path on the machine, which bends the wire ends backout of the way of the Saw clusters D11 at the adjacent side of themachine. Thus the saws are prevented from encountering the wires, whichwould tend to dull them.

The outermost blocks G5 present at their inner ends a transverse line ofabutments CZ for the cleat (l at one side of the blank E, fed acrossthem, vand the blocks are so adjusted relatively to each other that theblank will fit over a number of them, with the cleat at one of its edgescoinciding with the recesses between the outer end blocks and those nextadjacent to them and with the cleat at the other edge of the blankcoinciding with the alining recesses between two other adjacent rows ofthe blocks. In entering the machine the blank slides across and restsupon the series of bars f, then raised to receive it, as-

shafts.

shown in Fig. 3S, at the step-miter cuts to form the sides of a box)past the chippingclusters the timing of the mechanism M producesencounter of the crank h with the arm h3, thereby throwing the trip-barL accordingly to effect raising of the barsf to lift the blank above theplane of the carrier-blocks G5 and permit the latter to be returned totheir initial position by the rotation in the proper direction for thepurpose of the shaft G2, produced by thethrow of the trip-bar, causingengagement of the clutch 1l. Meantime the finished blank may7 he removedfrom the machine by any suitable means.

rlhe timing ofthe mechanism M is such that when the carrier has beenreturned to its initial position the consequent engagement of the crank7L with the arm h4 throws the tripbar L to disengage both clutches 1Lfi', and thus stop the carrier and raise the bars f to the position inwhich they are shown for receiving another blank E to be operated uponin the manner described.

The details of construction shown and described may of course bevariously modified by those skilled in the art without departing fromthe spirit of the invention as defined by the claims.

Vhat I claim as new, and desire to secure by Letters Paten t, is-

l. In a step-mitering machine, the combi-- nation with the saw andchipping-disk clusters on their rotary shafts, of a reciprocatorycarrier on the machine-bed, for the material to be step-mitered,afeed-clutch for engaging the carrier-driving gear to move the carriertoward said clusters, a return-clutch for engaging said gear to move thecarrier in the opposite direction, a reciprocable trip-bar connectedwith the movable members of said clutches to actuate them, a support forsaid material connected with said trip-bar to be lowered and raised byits movements to deposit the material on and lift it off said carrierand driving means engaging said tripbar to throw it alternately inopposite directions to actuate the clutches and support, sub? stantiallyas described.

- 2. In a' step-mitering machine, the combination with the saw andchipping-disk clusters on their rotary shafts, of a reciprocatorycarrier on the machine-bed, for the material to be step-mitered, saidcarrier comprising block-equipped endless chains on sprockets secured torotary shafts journaled toward opposite ends of the machine, afeed-clutch and gearing for connecting one of said sprocketshafts withits driving power to move the carrier toward said clusters, areturn-clutch and IOO IOS

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